>> yesterday president obama hit the switch lighting the national christmas tree. michelle obama and their daughters joined the president on stage counting down and as you see there, the president also did a little dancing with a little elf in those festivities. >>> a bay area family is one of 20 in the nation competing in the great christmas light fight. the family of san rafael. >> my collecting of disney got to a point where i felt i had enough holiday disney, you know, characters and mickeys, et cetera, that we decided to set up a display and incorporate my disney collection with our christmas decorations. >> the great christmas light fight is reality tv show and it will air right here on abc 7 starting next monday. i like that. the light fight. always good to see people go all out like that and feels like christmas in some places. a white christmas in the bay area? >> tahoe area, certainly. >> of course. >> 15 inches of new snow in sugar bowl and another hour or so until this is lifted but, wow, another one to two feet above 7,000 feet so looking good there an